Convert assert.Check(t, is.Error()) to assert.Error

git grep -l -P '^\s+assert\.Check\(t, is\.Error\(' | \
    xargs perl -pi -e 's/^(\s+assert\.)Check\(t, is\.Error\((.*)\)$/\1Error(t, \2/'

Signed-off-by: Daniel Nephin <dnephin@docker.com>

cli/command/formatter/node_test.go

@@ -203,7 +203,7 @@ foobar_boo  Unknown
 		testcase.context.Output = out
 		err := NodeWrite(testcase.context, nodes, types.Info{Swarm: swarm.Info{Cluster: &testcase.clusterInfo}})
 		if err != nil {
-			assert.Check(t, is.Error(err, testcase.expected))
+			assert.Error(t, err, testcase.expected)
 		} else {
 			assert.Check(t, is.Equal(testcase.expected, out.String()))
 		}